2u+21=-3(u-2)

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Solution for 2u+21=-3(u-2) equation: 



2u+21=-3(u-2)

We move all terms to the left:

2u+21-(-3(u-2))=0



We calculate terms in parentheses: -(-3(u-2)), so:

-3(u-2)

We multiply parentheses

-3u+6

Back to the equation:

-(-3u+6)



We get rid of parentheses

2u+3u-6+21=0

We add all the numbers together, and all the variables

5u+15=0

We move all terms containing u to the left, all other terms to the right

5u=-15

u=-15/5

u=-3

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